Iceweasel 15 (rebadged Firefox) on Linux.
https://aboutmybrowser.com/1027953242
Mozilla/5.0 (Linux; Android 4.0.4; cm_tenderloin Build/IMM76L) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Safari/535.19
Lynx 2.8.8dev.2: https://aboutmybrowser.com/4027520259
Links 2.1pre32: https://aboutmybrowser.com/3138479085
ELinks 0.11.1: https://aboutmybrowser.com/3604611808
(Text-based browsers deserve love, too.)
Seamonkey 2.3.3 on Linux: https://aboutmybrowser.com/1328892199
Konqueror 3.5.5 on Linux (yes, this is ancient): https://aboutmybrowser.com/4093315824
Epiphany 3.4 (GNOME's browser): https://aboutmybrowser.com/3704839315
Iceweasel 15 (rebadged Firefox) on Linux.